文本自动校对是自然语言处理的一个挑战性的研究课题,也是一个难题。该文对中文的错误类型和原因进行分析,提出了一种基于领域问答系统用户问题日志的错别字自动发现方法。该方法首先对语料进行分词,然后对分词的结果中出现的散串进行合并,对分词中的多字词和合并的串进行相似词串聚类,对相似词串的上下文语境进行统计分析,从中自动获取错别字对。实验表明,该系统获得71.32%的召回率,82.6%的准确率。

Text automatic proofreading is an important research issue in NLP, and still remaing as an challenge. This paper analyzes the type and the cause of Chinese errors, and proposes an automatic detection of typos based the user query log in the domain Question Answering System. First the word segmentation is performed on the corpus, then fragments in the word segmentation result are merged, After clustering the multi-character words and the merged strings, the approach gets typos pair automatically according to the contextual analysis of similar strings. The experiment show that the recall rate is 71.32% and accuracy rate is 82.6% for this method in actual question answering system logs.
Key wordstext automatic proofreading; question answering system; no-word error; real-word error; typos pair